What is CVE-2020-25912?

CVE-2020-25912 is a critical-severity vulnerability in Getsymphony Symphony, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.1/10. Published 2021-10-31.

How severe is CVE-2020-25912?

Critical severity. CVSS v3 base score is 9.1 out of 10.

XXE in Getsymphony Symphony

CVE-2020-25912

A XML External Entity (XXE) vulnerability was discovered in symphony\lib\toolkit\class.xmlelement.php in Symphony 2.7.10 which can lead to an information disclosure or denial of service (DOS).

Vulnerability class: XXE (XML External Entity)

Published 2021-10-31 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Getsymphony Symphony — versions 2.7.10

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
github.com/symphonycms/symphonycms/issues/2924 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-25912?: CVE-2020-25912 is a critical-severity vulnerability in Getsymphony Symphony, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.1/10. Published 2021-10-31.
How severe is CVE-2020-25912?: Critical severity. CVSS v3 base score is 9.1 out of 10.